Resinous product



.2 benzene is preferred. v

ture. Where salts of the hydroxypolymethylol We claim:

benzene are cornbinedor reacted with accroides l. The method of producing a resinwhich comguin no catalyst is necessary for facilitating prises reactinga-mixture consisting of gum acunion. In' general the hydroxypolymethylol bencroides and hydroxypolymethylol benzene having zene and the gum are, heated, under reflux if at leasttwocarbinol groups'attached to the I 4,0 desired, until bubbling of the reaction mixture benzene nucleus. indicates that reaction and condensation is pro- 2. The method of producing a resin which comceeding, whereupon the temperature is mainprises heating a mixture consisting of gum actained atreacting temperature ,until resin for croides and an hydroxypolymethylolbenzene havmaticn is completed. ing at least two carbinol groups attached to the The hydroxypolymethylol, derivatives and its [benzene nucleus. 1 45 homologs, cres0l,. xylenol, etc., 'have been pre- 3. The method-of producing aresin which compared and their properties studied. In general, prises refluxing a mixture consistingof a gum thesecompounds are wellcrystallized materials accroides and'hydroxypolymethylol benzenehav easily obtained in th'e pure state. Thus, the di- "ing at least two. carbinol groups-attached to the 7 5O methylol derivative of orthocresol is a well defined benzene nucleus.

A resinous product produced by reaction in the attached to the benzene nucleus. 3 3' I I i I i I UNITED?srATEs PATE T oF-Fice 7 7 Harry M. Dent, Eggertsville, and ,Alvin F. Shepard, Kenmore,'N. Y., assignors to General ,Plastics, 1nd, North 'llonawanda, N. Y. v i No Drawing. Application June 3, .1937, Scrial No. 146,243 a 6 Claims. orsen-25) This invention relates to synthetic resinous presence of caustic soda as a catalyst from about products and their method or manufacture and parts of gum accroides and-35 parts of the I more particularly to reaction products or" certain 'dirnethylol, derivative of. orthocresol cures mod-g natural resins of plant origin and hydroxypolyerately slowly and g the complete cure was obinethylol benzene. j r tained in about ,16 to 7 minutes. By increasing 5 The natural resins of plant origin reacted with the proportion of dimethylol derivative the cure the hydroxymethylol benzene comprise the variat 165'? C. can be somewhat-accelerated and ous natural gums designated as accroides,dragons a resin: obtained by reacting'equal parts of the blood and the like. The chemical compounds gum and dialcohol cures in. about 1 to 3 min- 10 reacted with this gum'with the production oflites. 7 3 10 resin suitable for use as a molding compound Somewhat morerapidrates of curing are poscomprise the salts or pure compounds of the sessed by the resinous products produced by the hydroxypolymethylol benzene series such as 1 reaction of the natural gum with dimethylol phehydroxy, 2,4 dimethylol benzene.v These comnol,metacreso1dialcohol ands ym m etrical'xylenol 5 pounds contain at least one hydroxy group and dialcohol. I

at least two methylol groups. The relative posi- Thus, by reacting 30 parts ofmetacresol di- I tion of attachmentof these groups to the ben alcohol with dragons blood'in-the presence of I zene nucleus appears, to be immaterial, but for v zinc chloride by heating the products under reeconomy of operation l-hydroxy, 2,4 dimethylol fiuxing conditionsuntil a resin is obtained, a 1

' i r "product is formedjcuring in about 3 to .4; min- 2 The ,hydroxypolymethylol benzene reacts with utes at 165 C., which time of cure can be dethe gum accroides over a wide range of proporcreased, to about .1 to 1 /2 minutesby increasing tions to produce excellent thermo setting resins. the quantity of metacresol dialcohol to 50 parts In general the parts of gum are within the range and decreasing the, dragons bloodto 50 parts. v 25 20-80 to -20 parts of hydroxypolymethylol-ben- From the foregoing, it will be seen that the 25 zene. The reactionfor condensation proceeds in present invention provides, aresinous material the presence of either acid or alkalinecatalysts, of thermo settingcharacter that can beadvanced includingcertain metal salts, although somewhat 0r cured ina relatively shortperiod of time. to better control of, the reaction, is possible with a hard, set infusible and insoluble material, a

30 alkaline cata1ysts.- The amount of catalyst em- I substance suitablelior use as a molding compound 30 ployed will vary depending upon the nature of and a resinous product thatican'be readily'and I I v the catalyst and physical conditionof the reaceasily produced'in acid, alkaline orneutral contion mixture. In general the amountof catalyst ditions or withlthe aid of metallic salts as catawill not exceed about 10% of the reaction mix lysts. 3'5

crystalline material with melting point 94C., 4. The resinous reaction product resulting from as are the dimethylol derivatives of paracresol, the reaction'cftheingredients of a mixture conparatertiary amyl phenol, metacresol and 'symsisting of gum arzcroides and hydroxypolyrnethmetrical xylenol; i ylol benzene having at least twocarbinol g O D 5.- The resinous reaction product resulting from the reaction of the ingredients of a mixture consisting of gum accroides anda salt of hydroxypolymethylol benzene having at least two carbinol groups attached to the benzene nucleus.

6. The resinous reaction product resulting from HARRY M. DENT. ALVIN F. SHEPARD. 

